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A Note on Roman Domination of Digraphs
Discussiones Mathematicae Graph Theory, 2019 A vertex subset S of a digraph D is called a dominating set of D if every vertex not in S is adjacent from at least one vertex in S. The domination number of a digraph D, denoted by γ(D), is the minimum cardinality of a dominating set of D.
Chen Xiaodan, Hao Guoliang, Xie Zhihong
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British Educational Research Journal, EarlyView.Abstract In response to globalisation, teacher education programmes worldwide are tasked with preparing globally competent teachers (GCTs). Prevailing conceptions of global competence are largely derived from Western‐centric humanistic, neoliberal and transformative narratives, creating a complex landscape for teacher identity formation.
Ji Ying
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Chilean science teachers' conceptualisations of disability when teaching students with autism
British Educational Research Journal, EarlyView.Abstract This study examines how Chilean secondary science teachers conceptualise disability when teaching students with autism in integrated classroom settings. Grounded in critical disability studies, the research employs a qualitative story‐completion method, using a fictional classroom scenario to prompt teachers to construct narratives that reveal
Alexis Gonzalez‐Donoso +1 more
wiley +1 more source
Biological Reviews, EarlyView.ABSTRACT Heat stress (HS) is an increasing threat to male reproductive health, disrupting spermatogenesis through complex and interdependent cellular responses within the seminiferous epithelium. Although excessive reactive oxygen species (ROS) production is a hallmark of HS, ROS also act as central regulators of cell fate decisions beyond their role ...
Ribrio Ivan Tavares Pereira Batista
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Signed Total Roman Domination in Digraphs
Discussiones Mathematicae Graph Theory, 2017 Let D be a finite and simple digraph with vertex set V (D). A signed total Roman dominating function (STRDF) on a digraph D is a function f : V (D) → {−1, 1, 2} satisfying the conditions that (i) ∑x∈N−(v)f(x) ≥ 1 for each v ∈ V (D), where N−(v) consists ...
Volkmann Lutz
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Navigating the Double Edge of Product‐Service Systems: User Behavior, Adoption, and Rebound Effects
Business Strategy and the Environment, EarlyView.ABSTRACT Product‐service systems (PSS) have been considered a promising approach to operationalizing the circular economy. Although many studies have outlined the potential sustainability gains of PSS solutions, it is still unclear what factors drive PSS adoption and how behavioral changes result in rebound effects, undermining their potential ...
Marina Fernandes Aguiar +3 more
wiley +1 more source
The study of Roman domination number
, 2015 碩士在一個圖G=(V,E)上， 定義一個函數 f 將V對應到{0, 1, 2}，假如f滿足每一個對應到0 的點都有一個對應到2的鄰居，函數 f 稱為羅馬控制函數。函數f的權重為圖中所有點相應的權重總和，而所有可能的羅馬控制函數中權重最小者稱為圖 G 的羅馬控制數。一個蜘蛛圖 G(k_1,k_2,k_3,…,k_t )為含有共同端點的t個路徑〖 P〗_(k_1 ), 〖 P〗_(k_2 ), …, 〖 P〗_(k_t )所形成的圖。一個一般蜘蛛圖〖 C〗_t (k_1,k_2,k_3,…,k_t ...
許智雄; Xu, Zhi-Xiong
core
Vertex–Edge Roman {2}-Domination
A vertex–edge Roman {2}-dominating function on a graph G=(V,E) is a function f:V⟶{0,1,2} satisfying that, for every edge uv∈E with f(v)=f(u)=0, ∑w∈N(v)∪N(u)f(w)≥2. The weight of the function f is the sum ∑a∈Vf(a).
Saiful Rahman Mondal, Ahlam Almulhim
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Total roman domination in digraphs
, 2021 Let D be a nite and simple digraph with vertex set V (D). A Roman dominating function (RDF) on a digraph D is a function f : V (D) → {0; 1; 2} satisfying the condition that every vertex v with f(v) = 0 has an in-neighbor u with f(u) = 2. The weight of an
Zhuang, Wei, Hu, Kangxiu, Hao, Guoliang
core
Tensions of Sustainability Logics: Performance of a Company Utilizing a Sustainable Business Model
Business Strategy and the Environment, EarlyView.ABSTRACT In recent years, companies have used sustainable business models to gain a competitive advantage. However, there are tensions due to the inconsistency between social, environmental, and economic logic in sustainable business models, making it difficult for companies to change. To understand the existing tensions and interactions between logics,
Ann‐Kristin Thienemann
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